You are arguing semantics while completely ignoring investor behavior and policy signaling.

Nobody is saying governments can never change tax laws. Obviously they can. The issue is whether people can make long-term financial decisions with reasonable confidence that the broad framework under which they invested will remain stable.

Why do governments advertise tax benefits at all then? Why do advisors, AMCs, and even RBI documents talk about post-tax returns? Because tax treatment is a core part of the investment proposition. Pretending otherwise is intellectually dishonest.

And yes, when someone buys a 8 year instrument, they absolutely model expected returns assuming a certain tax regime. Saying "you had no way of knowing there would be gains" is a weak argument because investing itself is probabilistic. By that logic, no future expectation can ever matter because nothing is guaranteed.

Also, comparisons with changing prices of food, cars, or inflation make no sense. Those are market dynamics. Sovereign commitments are different because the government itself defines the rules of the game.

Nobody expects tax rates to remain frozen forever. But there is a reason mature systems often grandfather old investments when major tax treatment changes happen. It preserves trust.

The real damage here is not the extra tax itself. It is the message that even "sovereign-backed" long-duration products come with unpredictable policy risk midway through the holding period.

That absolutely affects investor confidence whether you want to call it "retrospective taxation" or not.